U.S. Geological Survey

Nitrate Pollution / Mississippi River Basin
3:09 pm
Tue August 9, 2011

Nitrate pollution in Mississippi River Basin remains at 1980s levels, despite reduction efforts

A map showing each of the sites involved in the U.S. Geological Survey's study on nitrate pollution in the Mississippi River Basin.
(Courtesy U.S. Geological Survey)

A new study shows that despite decades of effort to reduce nitrate pollution in the Mississippi River Basin, concentrations remain as high today as they were in the 1980s.

The U.S. Geological Survey conducted the study, which looked at nitrate levels at eight sites on the Mississippi, Iowa, Illinois, Missouri, and Ohio rivers.

USGS hydrologist and study lead Lori Sprague said the next step will be to figure out where the pollution is coming from.

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